Cake For A Gift?

I made the following cupcakes for a nephew's surprise 18th birthday party at a golf club. I made 75 of them total. I gave him a small gift, and the cupcakes for the party. I know that it will probably be frowned upon since I didn't get a large gift or big check (it's a country club family--pretty superficial--you get the idea). Just want to get ready for the comeback that I'll need for the looking-your-nose-down-at-the-gift response I may get from the sister-in-law. I'd like to say that the cupcakes cost X amount of money, so I thought that would be appreciated. But, I'm not sure how much to tell her. What do you think for 75 time-consuming cupcakes?